Source: https://web.archive.org/web/20210405155458/https://twitter.com/Siliconinsid/status/1379100163000635395 Text: Intel 8051AH (1980) MCS-51 NMOS 8bit microcontroller with 4kB ROM and 128 Bytes RAM. The intel 8051 is possibly one of the most popular microcontroller architecture, with many derivatives and code compatible clones still produced today. #Intel #MCS51 #Microcontroller